<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<div id="box">
			<ul>
				<li>1</li>
				<li>2</li>
				<li>3</li>
				<li>4</li>
			</ul>
		</div>
		<p class="p1"></p>
		
		<script src="jquery.js" type="text/javascript" charset="utf-8"></script>
		<script type="text/javascript">
			$('#box')[0]  // id 选择器
			$('.box') 	  //  类选择器
			console.log($('#box li'));
		</script>
	</body>
</html>
